Roller coasters are mesmerizing for kids of all ages, and the Techno Trax Sea Trek offers kids an "under the sea" coaster experience! This Sea Trek edition replicates a real-life roller coaster, while your yellow submarine travels through the underwater fun park full of drops, twists, and turns as it makes its journey! The motorized chain returns your submarine to the top of the track where another exciting sea journey begins! Complete with over 150+ parts to build this impressive set, the detailed online instruction manual is very colorful and easy to use. This is a fantastic product that aligns with and supports STEM (Science, Technology, Engineering, and Math) standards. Assembled roller coaster measures over 2 feet wide and 1 foot tall! Requires 2 AA batteries (not included). Choking hazard Imported Material & Care Plastic Spot clean only